Logrotate configuration is missing for ironic-inspector. Prior to [1],
ironic-inspector logs were stored in
kolla_logs/ironic/ironic-inspector.log. After [1], the logs
are stored in kolla_logs/ironic-inspector/ironic-inspector.log
but the logrotate config was not updated.

[1]
https://github.com/openstack/kolla-ansible/commit/07453f346094b184a209380e375f6311987675be

Change-Id: I7e78faea361cd67069c1a96aaf0a2ffffc0e8666
Closes-Bug: #1701578